The Optimization of Siemens Turbine Synchronization Strategy

Abstract

The Siemens half speed turbine technology has been used in nuclear plants. When the turbine synchronizes to the grid at idling, the active power increases slowly. This will cause a reverse power generating to the unit or the generator low power at positive direction. And in synchronization to the grid with house load, the initial load has a large fluctuation. The power disturbance at synchronization will bring a transient shock to the unit, and it is no good for the coordination between reactor and turbine. This paper improves the strategy of synchronization for the Siemens turbine control system, modifies the match of speed setpoint and load setpoint in synchronization. The active power will leave 0 MW quickly at idling synchronization, and it can avoid the reverse power and low power at positive direction. The controller output won’t have a step change in synchronization with the house load, so the active power will not fluctuate greatly. This optimized scheme can reduce the power disturbance effectively for the turbine of the nuclear plant in synchronization.